I have a 07 GT....I HAD a 05 GTP. They are the same! The only difference is symbol in the middle of the steering wheel...the symbol on the middle of the rim. I havent noticed anything else. My 05 GTP had the GenV M90 my 07 Has the GenV M90. Pontiac just dropped the "P". Another difference is for some reason they made no tuning tools for the 06+ but you can however use a 04-05 PCM in the 07 and it works! The only trouble is your gas gauge will read backwards but if you use EFILive it will correct that!!